This book mainly introduces the working principles and practical applications of relay protection and safety automatic devices in power systems. Chapter 1 introduces the basic knowledge of relay protection, including voltage transformers, current transformers, converters, microcomputer protection hardware, and basic software knowledge. Chapters 2-6 introduce the working principles and configurations of transmission line relay protection and safety automatic devices; Chapter 7 introduces main equipment relay protection, including transformer protection. , Generator protection, busbar protection and circuit breaker failure protection; Chapter 8 introduces safety automatic devices for power supply networks, including automatic switching of backup power sources and automatic frequency-based load shedding devices; Chapter 9 introduces safety automatic devices for power plants, including excitation regulation and automatic parallel devices for synchronous generators.
